content: /*
   * Copyright 2016-present David Karnok
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package hu.akarnokd.rxjava3.string;
  
  import java.util.Objects;
  import java.util.regex.Pattern;
  
  import io.reactivex.rxjava3.core.*;
  import io.reactivex.rxjava3.internal.functions.ObjectHelper;
  import io.reactivex.rxjava3.plugins.RxJavaPlugins;
  
  /**
   * Utility class for String operations with {@link Flowable}s.
   */
  public final class StringFlowable {
      /** Utility class. */
      private StringFlowable() {
          throw new IllegalStateException("No instances!");
      }
  
      /**
       * Signals each character of the given string CharSequence as Integers.
       * @param string the source of characters
       * @return the new Flowable instance
       */
      public static Flowable<Integer> characters(CharSequence string) {
          Objects.requireNonNull(string, "string is null");
          return RxJavaPlugins.onAssembly(new FlowableCharSequence(string));
      }
  
      /**
       * Splits the input sequence of strings based on a pattern even across subsequent
       * elements if needed.
       * @param pattern the Rexexp pattern to split along
       * @return the new FlowableTransformer instance
       *
       * @since 0.13.0
       */
      public static FlowableTransformer<String, String> split(Pattern pattern) {
          return split(pattern, Flowable.bufferSize());
      }
  
      /**
       * Splits the input sequence of strings based on a pattern even across subsequent
       * elements if needed.
       * @param pattern the Rexexp pattern to split along
       * @param bufferSize the number of items to prefetch from the upstream
       * @return the new FlowableTransformer instance
       *
       * @since 0.13.0
       */
      public static FlowableTransformer<String, String> split(Pattern pattern, int bufferSize) {
          Objects.requireNonNull(pattern, "pattern is null");
          ObjectHelper.verifyPositive(bufferSize, "bufferSize");
          return new FlowableSplit(null, pattern, bufferSize);
      }
  
      /**
       * Splits the input sequence of strings based on a pattern even across subsequent
       * elements if needed.
       * @param pattern the Rexexp pattern to split along
       * @return the new FlowableTransformer instance
       *
       * @since 0.13.0
       */
      public static FlowableTransformer<String, String> split(String pattern) {
          return split(pattern, Flowable.bufferSize());
      }
  
      /**
       * Splits the input sequence of strings based on a pattern even across subsequent
       * elements if needed.
       * @param pattern the Rexexp pattern to split along
       * @param bufferSize the number of items to prefetch from the upstream
       * @return the new FlowableTransformer instance
       *
       * @since 0.13.0
       */
      public static FlowableTransformer<String, String> split(String pattern, int bufferSize) {
          return split(Pattern.compile(pattern), bufferSize);
      }
  
  }
  